Gallipolis, Ohio has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.4 °F (low) to 66.1 °F (high). Annual precipitation averages 43.7 Inches. Gallipolis is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.1 °F | 41.9 °F | 3.25 in. |
| February | 25.0 °F | 45.6 °F | 3.03 in. |
| March | 31.4 °F | 55.0 °F | 4.0 in. |
| April | 41.0 °F | 68.0 °F | 3.65 in. |
| May | 51.7 °F | 76.0 °F | 4.56 in. |
| June | 60.3 °F | 83.4 °F | 4.33 in. |
| July | 64.7 °F | 86.7 °F | 4.6 in. |
| August | 62.9 °F | 85.7 °F | 3.55 in. |
| September | 55.7 °F | 80.0 °F | 3.48 in. |
| October | 43.6 °F | 68.6 °F | 3.0 in. |
| November | 33.4 °F | 56.4 °F | 2.76 in. |
| December | 27.6 °F | 45.9 °F | 3.52 in. |
| Annual | 43.4 °F | 66.1 °F | 43.73 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |